From 43f55bbb144acca55cea50326388d1b648b6fd0f Mon Sep 17 00:00:00 2001 From: Asias He Date: Mon, 25 Feb 2013 14:03:44 +0800 Subject: [PATCH] target/file: Add fd_do_unmap() helper Add helper fd_do_unmap() to remove duplicated code in fd_execute_write_same_unmap() and fd_execute_unmap(). Cc: Christoph Hellwig Cc: Martin K. Petersen Cc: Nicholas Bellinger Signed-off-by: Asias He Signed-off-by: Nicholas Bellinger --- drivers/target/target_core_file.c | 72 +++++++++++++------------------ 1 file changed, 30 insertions(+), 42 deletions(-) diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c index 7e02304a1024..d5b84fac31c7 100644 --- a/drivers/target/target_core_file.c +++ b/drivers/target/target_core_file.c @@ -480,25 +480,16 @@ fd_execute_write_same(struct se_cmd *cmd) } static sense_reason_t -fd_execute_write_same_unmap(struct se_cmd *cmd) +fd_do_unmap(struct se_cmd *cmd, struct file *file, sector_t lba, sector_t nolb) { - struct se_device *se_dev = cmd->se_dev; - struct fd_dev *fd_dev = FD_DEV(se_dev); - struct file *file = fd_dev->fd_file; struct inode *inode = file->f_mapping->host; - sector_t nolb = sbc_get_write_same_sectors(cmd); int ret; - if (!nolb) { - target_complete_cmd(cmd, SAM_STAT_GOOD); - return 0; - } - if (S_ISBLK(inode->i_mode)) { /* The backend is block device, use discard */ struct block_device *bdev = inode->i_bdev; - ret = blkdev_issue_discard(bdev, cmd->t_task_lba, + ret = blkdev_issue_discard(bdev, lba, nolb, GFP_KERNEL, 0); if (ret < 0) { pr_warn("FILEIO: blkdev_issue_discard() failed: %d\n", @@ -507,7 +498,8 @@ fd_execute_write_same_unmap(struct se_cmd *cmd) } } else { /* The backend is normal file, use fallocate */ - loff_t pos = cmd->t_task_lba * se_dev->dev_attrib.block_size; + struct se_device *se_dev = cmd->se_dev; + loff_t pos = lba * se_dev->dev_attrib.block_size; unsigned int len = nolb * se_dev->dev_attrib.block_size; int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; @@ -521,6 +513,28 @@ fd_execute_write_same_unmap(struct se_cmd *cmd) } } + return 0; +} + +static sense_reason_t +fd_execute_write_same_unmap(struct se_cmd *cmd) +{ + struct se_device *se_dev = cmd->se_dev; + struct fd_dev *fd_dev = FD_DEV(se_dev); + struct file *file = fd_dev->fd_file; + sector_t lba = cmd->t_task_lba; + sector_t nolb = sbc_get_write_same_sectors(cmd); + int ret; + + if (!nolb) { + target_complete_cmd(cmd, SAM_STAT_GOOD); + return 0; + } + + ret = fd_do_unmap(cmd, file, lba, nolb); + if (ret) + return ret; + target_complete_cmd(cmd, GOOD); return 0; } @@ -531,13 +545,12 @@ fd_execute_unmap(struct se_cmd *cmd) struct se_device *dev = cmd->se_dev; struct fd_dev *fd_dev = FD_DEV(dev); struct file *file = fd_dev->fd_file; - struct inode *inode = file->f_mapping->host; unsigned char *buf, *ptr = NULL; sector_t lba; int size; u32 range; sense_reason_t ret = 0; - int dl, bd_dl, err; + int dl, bd_dl; /* We never set ANC_SUP */ if (cmd->t_task_cdb[1]) @@ -594,34 +607,9 @@ fd_execute_unmap(struct se_cmd *cmd) goto err; } - if (S_ISBLK(inode->i_mode)) { - /* The backend is block device, use discard */ - struct block_device *bdev = inode->i_bdev; - - err = blkdev_issue_discard(bdev, lba, range, GFP_KERNEL, 0); - if (err < 0) { - pr_err("FILEIO: blkdev_issue_discard() failed: %d\n", - err); - ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - goto err; - } - } else { - /* The backend is normal file, use fallocate */ - loff_t pos = lba * dev->dev_attrib.block_size; - unsigned int len = range * dev->dev_attrib.block_size; - int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; - - if (!file->f_op->fallocate) { - ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - goto err; - } - err = file->f_op->fallocate(file, mode, pos, len); - if (err < 0) { - pr_warn("FILEIO: fallocate() failed: %d\n", err); - ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - goto err; - } - } + ret = fd_do_unmap(cmd, file, lba, range); + if (ret) + goto err; ptr += 16; size -= 16; -- 2.20.1